From jan  Mon Jan  3 11:09:24 2000
Received: (from jan@localhost)
	by swi.psy.uva.nl (8.9.3/8.9.3) id LAA06251;
	Mon, 3 Jan 2000 11:09:24 +0100 (MET)
Date: Mon, 3 Jan 2000 11:09:24 +0100 (MET)
Message-Id: <200001031009.LAA06251@swi.psy.uva.nl>
From: Jan Wielemaker <jan>
Subject: Re: not sure if something's changed
To: "Douglas Miles (Volt Computer)" <a-doug@microsoft.com>,
        prolog@swi.psy.uva.nl
In-Reply-To: Volt Computer's message of Sun, 2 Jan 2000 11:38:51 -0800 
Phone: +31 - 20 - 525 6121
Content-Type: text

> I have a very large prolog data file that I consult into a program...
> 
> mypl.pl compiled, 41.72 sec, 46,816,660 bytes.
> 
> however that was on pl-3.2.8
> 
> now under pl-3.3.0 beta 6
> its taking 2 times longer 
> 
> as I said I don't know if something's different.. it might just be my HD

Nothing serious as far as I can tell.  There are some small
performance degradations due to the implementation of the `logical
update-view' semantics, but that should not be more than a few percent
max.  Since that version there are also changes to read/1 to make it
reentrant for the multi-threaded version.  That might have slightly larger
consequences, but twice as long!?

If you use a different machine, be aware that reported CPU-time on Windows
(except for NT) is actually ellapsed time.

If you cannot trace the problem, I'd like to have your file to profile the
loading process.

	Regards --- Jan

